[Jetboy]

I've only got 160k on my 3.4... only. Anyway it's been essentially flawless. I bought it used with good service records and they show no repairs to the engine or tranny. Plus an engine and tranny can be had for around 1200-1500 so it's not a huge expense if one were to go bad. If the rest of the vehicle is in good shape i'd be ok with it. The other wear parts would be a concern like wheel bearings and even differential bearings at this point, but they are easy enough to replace. I get much better mileage with my 3.4 than got with any of the other toyota trucks I've owned which includes 20 and 22r's and a 3.0 v6. Plus this is a 4runner so it's heavier. As for mileage I get an average of about 18 mixed and as much as 21 on the highway. I also run 265 70 17's (on Fgay cruiser wheels) so they are taller than the factory 265/70/16's which may reduce my mileage a little. I'm a big fan of the 3.4. Plus with the 3.0 issues it might be more reliable even with that many miles. I never had a single problem with my 3.0 though.